Sunan an-Nasa'i · 5057
Sahih Lighairihi · Abu Ghuddah
Sahih · Al-Albani
Daif · Zubair Ali Zai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا بِشْرٌ، عَنْ يُونُسَ، عَنِ الْحَسَنِ، وَمُحَمَّدٍ، قَالاَ التَّرَجُّلُ غِبٌّ .
It was narrated that Al-Hasan and Muhammad said:"Combing one's hair (should be done) every other day